Apparatus for purifying air



(No Model.) 2 sheets-sheet 1.

B. s. BENSON. APPARATUS FOR PURIFYING AIR.

N9. 438,464. Furl. Patented Oct. 14, 1890.

IN VENTOH dim,

A TTORNE Y8 (No Model.) A 2 Sheets-Sheet 2.

B. S. BENSON. APPARATUS FDR PURIPYING AIR.

No. 438,464. Patented Oct. 14, 1890.

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UNITED STATES PATENT OFFICE.

BENJAMIN S. BENSON, OF BALTIMORE, MARYLAND.

APPARATUS- FOR PU RIFYING AIR.

SPECIFICATION forming part of Letters Patent No. 438,464, dated October14, 1890.

Application filed January 17, 1890. Serial No. 337,261. (No model.)

To aZZ whom it may concern.-

Be it known that I, BENJAMIN S. BENsoN,

' residing in the city of Baltimore, in the State of ticularly toimprovements on a similar invention patented by me May 7, 1889, No.402,714.

My invent-ion consists in the peculiar construction and novelcombination of parts, all of which will hereinafter be fully describedin the annexed specification and particularly the filtering-webs.

pointed out in the claims, reference being had to the accompanyingdrawings, in which Figure 1 is a perspective view of my improvement,showing the same in operative position. Fig. 2 is a section of the upperpart of the filtering-box with the heating-chamber in position thereon.Fig. 3 is a perspective view of one of the filtering-webs. Fig. 4 is adetail view illustrating the manner of arranging the series of tapes toform the spaces in Fig. 5 is a detail View illustrating the flexibletubes and the air-delivering nozzle-connections. Fig. 6 is a detailsection hereinafter referred to.

In the practical application of my improved purifier I arrange afiltering-case in the room, preferably near a window, such case beingformed bureau-like, in a manner similar to that shown in my otherpatent. In adjusting the several bureau-sections together I arrange theside and end pieces so that the grain of the wood extends aroundhorizontally to prevent a greater shrinkage of the doors than the sidesand back of the case. The sides and back in myother case referred to ranup and down, the front wall of each section A being provided with ahinged door a, the grain of which runs horizontally, the abutting edgesof which are provided with a corded tape a or similar material to forman air-tight joint when the door is closed.

The case A is formed with a series of compartments a formed with theledges a a into which and supported on the ledges are slid thefiltering-websD, one of which is clearly shown in Fig. 3 of thedrawings. In the construction shown I provide a metallic box orreceptacle D, formed with a foraminous baseplate D having handles (1 (1which swivel around the ends of the base-plate, so as to form a handleon either side. The web portions D consist of a series of strips ofmuslin tape or other flexible material coated with a suitable antisepticor absorbent material, such as gypsum.

Each web portion D of the filtering-sections is formed of a series ofsuch flexible strips woven together in a manner clearly shown in Fig.4of the drawings, by reference to which it will be seen that I attach theends of a series of cords 1 1 to the end strips, and which arealternately passed over and under the intermediate strips, as shown, andsecured tov the opposite end strips, a sheet-metal casing D encompassingthe sides and ends of the complete set of strips, said cords serving tohold said tapes at a certain distance apart, such distance beingdetermined by the size of the cord or wire used. Each complete set ofstrips is seated in the box D, and is detachably held therein by theremovable pins d Which pass through the apertures cc in the end walls ofthe box D and the metal casing and enter between the strips, as shown.

I sometimes make the strips of woven wire instead of cotton fabric anduse annealed wire for weaving them together instead of cord, this formbeing most desirable where it would take great heat to kill the malariain the atmosphere.

F denotes the heating-case, which is formed with a hot-air chamber F,similar in construction to the one shown in my other patent referred to.I fixedly secure said case by soldering or otherwise to the top of thefilteringchamber, which in this instance is formed of metal, said tophaving the air-discharging holes ff, which register with the hot-airchamber F. v I

The lamp and lamp-chamber F are of the construction shown in my othercase, except that I raise the bottom of the lamp from the base of thechamber G, so as to permit the air which enters the hole m to pass underas well as around the lamp. The combustion- 1 being surrounded by ahot-air fiue J, which in turn is incased by a jacket or tube K, whichforms a non-conducting chamber about the hot-air flue to keep the heatof the lamp from heating the room in warm weather and to keep thepurified air hot, so as to more eflt'ectually destroy the bacteria init. The hotair flue extends up to or near the ceiling, where it connectswith a branch flue 1 which extends to a point over the bed to lead thepurified air to the patient, in a manner presently described.

In the practical use of the construction of the combustion-pipe shown inmy other patent referred to I found it impossible to keep the lampburning for any length of time. In the present construction I extend thecombustion-pipe above the hot-air line and then downward, as shown, to apoint near the case F, where I form it with a series of apertures 1/2.,around which I dispose a sleeve G, open at the lower end, as shown at g.This construction admits of the lamp-smoke which maybe contained in thecombustion-pipe being puffed out into the said sleeve when a room-dooris closed quickly instead of being drawn back toward the lamp, as wouldbe the case in vthe use of the other construction referred to. Thecombustion-pipe is then again carried upward and extended into thechimney or through the wall, it necessary.

By arranging the combustion-pipe as described additional means areprovided for purifying the air, as the hot air in the pipe I produces apartial vacuum and draws the foul air of the room into said pipe I,forming a suction-draft to carry said mixed air out, thus forming anexcellent forced ventilation to carry 01f the exhalations of thepatient.

L denotes the cold-air-inlet pipe, which projects to without thebuilding, preferably through the window-strip Z, as shown, and whichconnects with the purifying-chamber below the filtering-webs D.

When the outside air is very cold, it will not filter well. In such caseI arrange the airs upply pipe to enter through the upper strip i (seedotted lines) and carry same down alongside the pipe I which serves towarm the fresh air before it enters the filter-case.

The purified-air pipe, which extends down to the head-board of the bed,is connected by means of a coupling-piece S, to which is connected adownward extension 1 to which is connected a flexible tube M, providedwith a suitable stop-cock, said tube adapted to lead the air beneath thebedclothes.

I denotes a pipe extended downward and which has a swiveled connectionwith the coupling S at its upper end, while its lower end is providedwith a stuffing-box j, through which and in the lower end of said pipe Islides a short pipe 1 To the lower end is connected a flexible tubeN,provided with a suitable stop-cock n, which tube serves to supply theair to the head of the patient.

By arranging the feed-pipes as described it will be observed that theyhave practically a universal movement, and can therefore be raised,lowered, or swung sidewise and around, as the occasion may require.

From the foregoing description, taken in connection with the drawings,the advantages and operation of mycomplete device will be readilyunderstood.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s-

1. An air-purifying apparatus consisting of the filtering-case A, aheating-case mounted thereon, having a heating-chamber F acombustion-pipe I, connected with said chamber and extended to anoutside air-draft, said pipe provided with a perforated portion betweenits connection with the heating-chamber and its discharge end, a hot-airchamber F, surrounding the heating-chamber F and a discharge-pipe J,connected with said chamber F, substantially as and for thepurposcdescribed.

2. The combination of the filtering-case A, the heating-case F,connected therewith, as shown, said case formed with a heating-chamber Fprovided with a combustion-pipe I, connected therewith and extendedwithout the building, the hot-air chamber F, surrounding saidheating-chamber F and cxtended into a flue surrounding thecombustion-pipe, a non-conducting jacket encircling said hot-air fine,and a discharge-pipe connected with the hot-air flue, substantially asand for the purpose described.

3. The combination of the filtering-case A, the heating-case F,connected thereto, provided with a heating-chamber F the combustion-pipeI, connected at one end to the heating-chamber, its opposite endconnected with an outside draft, saidpipe provided with a perforatedportion, a cover orcap-plate sur rounding said perforated portion,havingan open bottom, a hot-air chamber and fine F, surrounding theheating-chamber and a portion of the combustion-pipe, and adischargepipe connected to said hot-air fiue, all arranged substantiallyas and for the purpose described.

4. In an air-purifier, the combination, with the filtering-case, of theheating-case connected thereto, having a heating-chamber F acombustion-pipe I, connected therewith, a hot-air drum surrounding saidchamber F and a portion of the pipe I, said drum provided with adischarge-pipe, said combustion-pipe extended downward from the upperend of the hot-air drum,provided in said depending portion withapertures, and a bottomlesstube surroundin g said apertured portion,saidpipe tachably held in said box, said sections consisting of a series offlexible webs and the threads interwoven about said sections, saidthreads secured to the outer webs, substantially as and for the purposedescribed.

6. The combination, with the box or receptacle D, having a foraminousbase-plate D and apertured end walls, of the filtering-sections D formedof a series of flexible webs held together, a sheet-metal casing Dencircling the end and sides of said filter-sections, the end portionsof said casing having apertures, and the securing-pins adapted to bepassed through said apertures in the ends of the box and metal casing,substantially as and for the purpose described.

7. The combination,with the heating-case F, provided with aheating-chamber F and a hot-air drum surrounding said chamber, said drumprovided with fresh-air inlets at its lower side, of the combustion-pipe Lconnected to the heating-chamber, and a hot-air flue J,connected to the drum and surrounding said pipe I and provided with afresh-air-discharge pipe, said combustion-pipe I provided with adownward extension, said extension formed with a series of apertures it,adapted to suck in the impure air of the roo1n,and with an upwardextension adapted to discharge said impure air to without the building,substantially as and for the purpose described.

8. The combination of the air-purifying devices consisting of the casinghaving a heating-chamber, a hot-air drum' surrounding saidheating-chamber, provided with fresh-air in- BENJAMIN S. BENSON.

Witnesses:

FRED G. DIETERICH, SoLoN C. KEMON.

